Brick-kiln furnace



(Nu Model.)

W. H.. MARTIN.y BRIGK KILN PURNAGB.

No; 472,738.` lPammted Apr. 12, 1892.

11's a Hrw/rey.

lNirnD STATES PATENT OFFICE.

VILLIAM H. MARTIN, OF COVINGTON, KENTUCKY.

BRlCK-KILN FURNACE.

SPECIFICATION forming part of ,Letters Patent No. 472,738, dated April 12, 1892.

Application filed May 2, 1890. Serial No. 350,401. (No model.) A

To all whom t may concern:

Be it known that I, WILLIAM H. MARTIN, a citizen of the United States, residing at Covington, in the county of Kenton and State of Kentucky, have invented a new and useful Improvement in Brick-Kiln Furnaces, of which the following is a specification.

My invention relates to an improvement in brick-kiln furnaces; and it consists in casting the frame of the furnace separate from the thebearing-barsoranges,makingsaidframes removable or portable, thereby making a more simple, cheap, and serviceable furnace. Heretofore the door-frames of such furnace were made of cast-iron, with upper and lower bearing-bars or flanges cast upon them, causing an unequal expansion of the casting. In fact, in a short time the framel becomes Warped and useless, as the door cannot be closed to prevent loss of heat and the entrance of cold air to chill and spoil the brick. Y

By my improvement the several pieces of iron used in building the furnace are cast separate. Oontraction and expansion are therefore more equal and the construction of the furnace more simple and serviceable. Vith frames in use at present two sets must be had, as it is impossible to remove the frames immediately after burning a kiln without injury to the kiln-walls. With my invention one set of frames and two sets of loose flanges will be all that a brick-maker will need. Hence asaving of one-half in the cost. I use wrought or cast iron frames. By making a hinge on the lug outside the bearing-bar or flange, as shown, the iire and rustlingdoor can be hung on the same without any frame, and the frame may be made only to reach down to the lug of the drop-apron or ash-pit door when the brickmaker wishes to set his brick-kiln to suit such economical construction.

The great objection to all portable kilnfurnaces nouT in use is that, being stationary on the outside of the kiln-walls when -in a green state, as the bricks dry out in burning the walls will shrink, contract, and incline inward, leaving an opening between the frame and kiln-walls, thereby letting the heat escape.

In my improvement the bearingbars or llanges which secure the frame to the kilnwalls, being built in the walls, will follow the contractionand inward fall of the kiln-walls and having the frame secured to them will hold the same to the face ofl the kiln-walls, however great the shrinkage.

Myinvention will suit square or round kilns and can be used in permanent as well as temporary brick-kiln furnaces.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l s au elevation of the front of the furnace. Fig. 2 is a vertical section of the iron of the furnace on lines 1 and 2 of Fig] Fig. 3, a horizontal plan of the lower flange or bearing-bar. Fig. 4 shows how the frame may be screwed to the bearing-bar or ange. Fig. 5 shows how the frame may be vertically hung to the same; Fig. 6, a horizontal plan of the upper bearing-bar or ilange, showing how it may be bolted and dovetailed.

Like letters of reference indicate like part-s.

A indicates the upper bearing-bar or flange to support the kill Walls or arch. It may be straight or arched. It will have a turned-up flange o at vits 'back to anchor it safe in the kiln-walls. The frame B will be slipped close and flush on its face and held by dovetail fn and slots in lugs a on each side of the anges or bearing-bars in a portable manner.

A is the lower bearing-bar or ilange. It will also have slots in lugs a on each side to hold the frame tight to its face. It will also have back upright flanges o to anchor it to the kiln-walls, and on it will rest the shaking grate G, the stems of which will come out through holes K in the frame B to the front, that the grate may be shaken. The lugs a on the flanges can be made to form a hinge to hang the doors upon when the frame B is dispensed with. The frame Bcan be made in one, two,

or four parts and slipped on or taken 0E at i to out the clinker Cold air cannot enter the Patents No. 88,316 and No. 296,813, and disre-grate to Chill the brick, but must pass claim all and everything oon-tained inA them. Y through the fire below. The fire-door C may What I Claim isbe made to have this door fixed in it below. In a brick-kiln furnace, the bearingbars or 5 frepresents lugs cast on the face of the flanges A and A', made separate from the I5 frame B to hold it on the bearing-bars or frame, substantallyas shown and described. flanges A above. WM. H. MARTIN.

The shaking grate G will be supported by In presence ofchecker-brek on the inside of the kiln. l I W. P. MOLAUGHLIN,

o I am aware of the construction described in JOHN GILLIGAN. 

